52
Observe the safety data sheet
Follow the safety instructions on the lubricant's safety data
sheet
When routing the main lubricant lines and the feed lines,
observe the following instructions in order to ensure that the
entire centralized lubrication system functions smoothly. The
main lubricant line must be dimensioned in accordance with the
maximum pressure occurring in the lubrication unit used and
the delivery volume of that lubrication unit. If possible, the main
lubricant line should rise upward from the lubrication unit and
be ventable at the highest point on the lubrication line system.
The pipes, hoses, shut-off valves, directional control valves,
fittings etc. that will be used
must be designed for the maximum operating pressure of the
lubrication unit, the permissible temperatures, and the
lubricants that will be supplied. The lubrication line system also
needs to be protected from excessive pressure by means of a
pressure limiting valve.
All components of the lubrication line system such as pipes,
hoses, shut-off valves, directional control valves, fittings, etc.
must be carefully cleaned before assembly. No seals in the
lubrication line system should protrude inwards in a way that
disrupts the flow of the lubricant and could allow contaminants
to enter the lubrication line system. Lubrication lines should
always be arranged so that air inclusions cannot form
anywhere. Avoid changes in the cross-section of the lubrication
line from small to large cross-sections in the flow direction of
the lubricant. When the cross-section does change, the
transition should be gentle. The flow of lubricant in the
lubrication lines should not be impeded by the incorporation of
sharp bends, angle valves, or flap valves. Unavoidable changes
in the cross-section in lubrication lines must have smooth
transitions. Sudden changes of direction should be avoided if
possible.
6.14 Venting an MKU/MKF/MKL
centralized lubrication system
Single-line centralized lubrication system
Legend to Figure 93:
1 Lubrication points
2 Filler neck
3 First metering device
The process of bleeding the air from the centralized lubrication
system can be facilitated by:
• Opening the ends of the main pipes until lubricant without
bubbles is discharged
• Filling long pipe sections before connecting to the lubrication
points
1. Fill the pump gear unit with lubricant via the filler neck
(Fig. 93/2)
2. Detach the lubricant line at the end of the first metering
device (Fig. 93/3)
3. Allow the pump to run until lubricant without bubbles
discharges
4. Mount the lubrication line
5. Repeat the venting procedure at the following metering
device
6. Allow the pump to run until oil can be seen discharging at all
lubrication points
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